发明授权
- 专利标题: Acoustic matching member, ultrasound transducer, ultrasonic flowmeter and method for manufacturing the same
- 专利标题(中): 声匹配构件,超声波换能器,超声波流量计及其制造方法
-
申请号: US10434516申请日: 2003-05-07
-
公开(公告)号: US06788620B2公开(公告)日: 2004-09-07
- 发明人: Seigo Shiraishi , Norihisa Takahara , Masaaki Suzuki , Kazuhiko Hashimoto , Takashi Hashida , Hidetomo Nagahara , Masahiko Hashimoto
- 申请人: Seigo Shiraishi , Norihisa Takahara , Masaaki Suzuki , Kazuhiko Hashimoto , Takashi Hashida , Hidetomo Nagahara , Masahiko Hashimoto
- 优先权: JP2002-140687 20020515
- 主分类号: H04R100
- IPC分类号: H04R100
摘要:
An acoustic matching member that is incorporated into an ultrasonic transducer for transmitting and receiving ultrasonic waves, includes: at least two layers including a first layer and a second layer that have different acoustic impedance values from each other. The first layer is made of a composite material of a porous member and a filing material supported by void portions of the porous member, the second layer is made of the filling material or the porous member, and the first layer and the second layer are present in this stated order. A piezoelectric member is disposed on a side of the first layer of the acoustic matching member to form an ultrasonic transducer or an ultrasonic flowmeter. The acoustic matching member does not have independent intermediate layers between the layers, so that delamination hardly occurs and the difficulty in the designing associated with the presence of intermediate layers can be avoided.